I would look for differences among 4 different groups (A, B, C, D). e.g. I expected that the impaiment is A<B<C<D. Thus, I should opt for G1+G3 vs G2+G4 or G1+G2 vs G3+G4? Other option? Sorry, I'm confused on this matter and worried to produce correct results. Thank you very much. Best regards Stefano
>----Messaggio originale---- >Da: "Douglas N Greve" <gr...@nmr.mgh.harvard.edu> >Data: 20-apr-2017 17.07 >A: <freesurfer@nmr.mgh.harvard.edu> >Ogg: Re: [Freesurfer] R: Re: R: Re: FSGD file FS-FAST > > > >On 04/19/2017 04:37 PM, std...@virgilio.it wrote: >> I'm sorry but it not clear to me. There are 2 factors, 2 levels, while I have 1 >> Factor, 4 Levels >It is still four groups. >> In particular, have I looked to difference between Group1+Group2 vs >> Group3+Group4? >> Is it correct 0.5 -0.5 0.5 -0.5? >That will give you G1+G3 vs G2+G4 >> Thanks >> >> Stefano >> >>> ----Messaggio originale---- >>> Da: "Douglas N Greve" <gr...@nmr.mgh.harvard.edu> >>> Data: 19-apr-2017 19.23 >>> A: <freesurfer@nmr.mgh.harvard.edu> >>> Ogg: Re: [Freesurfer] R: Re: FSGD file FS-FAST >>> >>> There is one for 4 Groups with 1 covariate. Use that one and do not >>> include the covariate. >>> >>> >>> On 04/19/2017 02:37 AM, std...@virgilio.it wrote: >>>> I did not find it for for 4 Groups (1 Factor, 4 Levels), Zero Covariates. >>>> >>>> I need for check to avoid error on my analysis. >>>> Please could you say me whether the followed codes are correct. >>>> >>>> A) Group effect >>>> 1 -1 0 0 >>>> 1 0 -1 0 >>>> 1 0 0 -1 >>> This will generate an F test for the group effect >>>> B) 0.5 0.5 -0.5 -0.5 >>> This looks like it will test a difference between Group1-and-2 vs >>> Group3-and-4 >>>> Many thanks. >>>> >>>> Stefano >>>> >>>> >>>> >>>> ----Messaggio originale---- >>>> Da: "Douglas Greve" <gr...@nmr.mgh.harvard.edu> >>>> Data: 19-apr-2017 3.50 >>>> A: <freesurfer@nmr.mgh.harvard.edu> >>>> Ogg: Re: [Freesurfer] FSGD file FS-FAST >>>> >>>> Have you looked at >>>> https://surfer.nmr.mgh.harvard.edu/fswiki/FsgdExamples ? >>>> >>>> >>>> On 4/17/17 5:32 PM, std...@virgilio.it wrote: >>>>> Hi list, >>>>> please could you suggest me the group.effect.mtx and the file.mtx >>>>> relative to Null Hypothesis for 4 Groups (1 Factor, 4 Levels), >>>>> Zero Covariates. DODS or DOSS. >>>>> Thanks >>>>> Stefano >>>>> >>>>> >>>>> _______________________________________________ >>>>> Freesurfer mailing list >>>>> Freesurfer@nmr.mgh.harvard.edu >>>>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> Freesurfer mailing list >>>> Freesurfer@nmr.mgh.harvard.edu >>>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >>> -- >>> Douglas N. Greve, Ph.D. >>> MGH-NMR Center >>> gr...@nmr.mgh.harvard.edu >>> Phone Number: 617-724-2358 >>> Fax: 617-726-7422 >>> >>> Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting >>> FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 >>> www.nmr.mgh.harvard.edu/facility/filedrop/index.html >>> Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ >>> >>> _______________________________________________ >>> Freesurfer mailing list >>> Freesurfer@nmr.mgh.harvard.edu >>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >>> >>> >>> The information in this e-mail is intended only for the person to whom it is >>> addressed. If you believe this e-mail was sent to you in error and the e- mail >>> contains patient information, please contact the Partners Compliance HelpLine >> at >>> http://www.partners.org/complianceline . If the e-mail was sent to you in >> error >>> but does not contain patient information, please contact the sender and >> properly >>> dispose of the e-mail. >>> >>> >> _______________________________________________ >> Freesurfer mailing list >> Freesurfer@nmr.mgh.harvard.edu >> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >> >> > >-- >Douglas N. Greve, Ph.D. >MGH-NMR Center >gr...@nmr.mgh.harvard.edu >Phone Number: 617-724-2358 >Fax: 617-726-7422 > >Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting >FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 >www.nmr.mgh.harvard.edu/facility/filedrop/index.html >Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ > >_______________________________________________ >Freesurfer mailing list >Freesurfer@nmr.mgh.harvard.edu >https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
